The Big Dipper

One of my first tries in taking constellation pictures : The Big Dipper. Right now it's unprocessed because I haven't found a way to process it and be satisfied with the result. Actually, I like the raw file better than I do the processed image.
I'm still reading about how to prcess images, so hopefully I'll come back to this shot soon and post a processed version.

This picture was taken in the center of town, in a park, with a Canon 450 Xsi camera and a tripod.
Settings: ISO 400, 10 sec exposure and f/4.5 with an 18-55 mm lens.

You can see Alcor and Mizar clearly :) I don't have great eyes, so this is the first time I see the two :)